Presentation on theme: "Jigsaw activity: How does mutation lead to Adaptation?"— Presentation transcript:
1 Jigsaw activity: How does mutation lead to Adaptation? What is Natural Selection?Give an example of Natural Selection.What is the Theory of Evolution?What evidences support Evolution?
2 Jig saw Activity: Adaptation, Natural Selection, and Evolution QuestionsNotesHow does mutation lead to Adaptation?Give an example of Natural Selection.What is Natural Selection?What is the Theory of Evolution?What evidences support Evolution?
3 5. What evidences support Evolution? Jigsaw activity:On a piece of A3 paper, write a paragraph summary that answers your assigned question. Be ready to present your answers to your peers.How does mutation lead to Adaptation?3. Give an example of Natural Selection.5. What evidences support Evolution?4. What is the Theory of Evolution?2. What is Natural Selection?
6 AdaptationAdaptation is a long evolutionary process where a population becomes better suited to its habitat.Feature which is especially important for an organism'ssurvival.Horse’s teethSuch adaptations are produced by the better suited forms reproducing more successfully, which is natural selection.
7 Adaptation is driven by Natural Selection 2Adaptation is driven by Natural Selection
9 There are 2 variations of the beetles, green and red. The birds prefer eating the green beetles.Over generations the red beetles increase in population because they are not eaten by the birds.More survive to produce more offspring.Generations later….Over time the red beetles have been selected over the green beetles
10 An Example of Natural Selection 3An Example of Natural Selection
11 How did giraffe’s develop their long necks? Giraffe you tube video
12 Incorrect model of evolution Change through use and disuse
13 Natural Selection’s Explanation Ancestors had different neck lengthsThrough natural selection, longer necks survived and passed on their genes.Eventually all giraffes had long necks.
16 EvolutionEvolution is the change in the inherited traits (passed on from parents to offspring) of a population over many generations. These traits could be physical, chemical or behavioral.This change is caused by mutations in the genes.
17 Video Clip: http://www.youtube.com/watch?v=yVqJ_mQazik
18 How does Evolution Work? Natural Selection(survival of the fittest) is simply the logical result of four features of living systems:VARIATIONIndividuals in apopulationvary from oneanother (differentgenes caused bymutations)INHERITANCEparents pass on their traits totheir offspring geneticallySELECTIONsome variants reproduce more than othersTIMEsuccessful variations accumulate over many generations